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夏秋季节天气系统对边界层内大气中PM10浓度分布和演变过程的影响
引用本文:任阵海,苏福庆,陈朝晖,等.夏秋季节天气系统对边界层内大气中PM10浓度分布和演变过程的影响[J].大气科学,2008,32(4):741-751.
作者姓名:任阵海  苏福庆  陈朝晖  
作者单位:1.中国环境科学研究院,北京,100012
基金项目:国家重点基础研究发展规划计划项2006CB403607、2004CB418300,国家自然科学基金资助项目40221503、40575028、40523001、40575041
摘    要:边界层内的气压场直接影响区域性的大气环境质量,天气系统的变化与边界层气压场形势直接相关。根据2000~2006年大气环境监测资料的日均值和日增(减)量分布图,同时对夏秋季节主要的天气系统,副热带高压和台风进行耦合诊断分析,得出西太平洋高压和台风的时空演变对我国环境质量有十分重要的影响,这种影响主要是形成的高压均压场对污染物有累积效应,也出现污染物的汇聚,而其周边流场对区域污染物有输送作用。此外,天气系统的降水分布又对大气污染物有清除的作用。而且天气形势演变的空间和周期性形成了大气环境的区域性和过程性等复杂的特征。本文选择典型个例,进行剖析研究。在地面高压或500 hPa高度上5880 gpm等高线控制区内,造成大范围的静稳型区域性污染物的增量过程。在副高周边地区的雨区内经常是PM10的谷值期。夏秋季节台风近周边和远周边的影响区,经常是PM10峰值或较重污染物浓度出现区域。

关 键 词:环境过程  副高  台风

Influence of Synoptic Systems on the Distribution and Evolution Process of PM10 Concentration in the Boundary Layer in Summer and Autumn
REN Zhenhai,SU Fuqing,CHEN Zhaohui and et al.Influence of Synoptic Systems on the Distribution and Evolution Process of PM10 Concentration in the Boundary Layer in Summer and Autumn[J].Chinese Journal of Atmospheric Sciences,2008,32(4):741-751.
Authors:REN Zhenhai  SU Fuqing  CHEN Zhaohui and
Abstract:The pressure field in the boundary layer affect regional atmospheric environmental quality directly,the changes of synoptic systems are related to the pressure field in the boundary layer.Based on the daily mean and increment figures of atmospheric environmental monitoring data during 2000-2006,the subtropical high and the typhoon are analyzed,which are important synoptic patterns in summer and autumn,results show that the temporal and spatial evolutions of these systems have important influence on the environmental qualities in China because high pressures and transports of wind field lead to pollutant accumulating.Moreover,rain can clear the atmosphere pollutant.The periodic evolvements of synoptic systems form the regional characteristic and periodic evolvements of atmospheric environment.Typical examples are chosen and analyzed in this paper.In the region of isohypse 5880 gpm at 500 hPa and high pressure at the sea surface,there are large-scale stable and regional pollution processes.PM10 concentration is low in the marginal area of subtropical high.PM10 concentration is high in the near and far influenced areas of typhoon.
Keywords:environmental process  subtropical high  typhoon
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